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crypto: morus - Add generic MORUS AEAD implementations

Browse source 
This patch adds the generic implementation of the MORUS family of AEAD
algorithms (MORUS-640 and MORUS-1280). The original authors of MORUS
are Hongjun Wu and Tao Huang.

At the time of writing, MORUS is one of the finalists in CAESAR, an
open competition intended to select a portfolio of alternatives to
the problematic AES-GCM:

https://competitions.cr.yp.to/caesar-submissions.html
https://competitions.cr.yp.to/round3/morusv2.pdf

Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ondrej Mosnacek 2018-05-11 14:19:09 +02:00 committed by Herbert Xu
parent 1d373d4e8e
commit 396be41f16
5 changed files with 1130 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

12
crypto/Kconfig
View file

@ -334,6 +334,18 @@ config CRYPTO_AEGIS256_AESNI_SSE2
help
AESNI+SSE2 implementation of the AEGSI-256 dedicated AEAD algorithm.
config CRYPTO_MORUS640
tristate "MORUS-640 AEAD algorithm"
select CRYPTO_AEAD
help
Support for the MORUS-640 dedicated AEAD algorithm.
config CRYPTO_MORUS1280
tristate "MORUS-1280 AEAD algorithm"
select CRYPTO_AEAD
help
Support for the MORUS-1280 dedicated AEAD algorithm.
config CRYPTO_SEQIV
tristate "Sequence Number IV Generator"
select CRYPTO_AEAD

2
crypto/Makefile
View file

@ -89,6 +89,8 @@ obj-$(CONFIG_CRYPTO_CHACHA20POLY1305) += chacha20poly1305.o
obj-$(CONFIG_CRYPTO_AEGIS128) += aegis128.o
obj-$(CONFIG_CRYPTO_AEGIS128L) += aegis128l.o
obj-$(CONFIG_CRYPTO_AEGIS256) += aegis256.o
obj-$(CONFIG_CRYPTO_MORUS640) += morus640.o
obj-$(CONFIG_CRYPTO_MORUS1280) += morus1280.o
obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o
obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o
obj-$(CONFIG_CRYPTO_MCRYPTD) += mcryptd.o

549
crypto/morus1280.c Normal file
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@ -0,0 +1,549 @@
/*
* The MORUS-1280 Authenticated-Encryption Algorithm
*
* Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
* Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#include <asm/unaligned.h>
#include <crypto/algapi.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/skcipher.h>
#include <crypto/morus_common.h>
#include <crypto/scatterwalk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/scatterlist.h>
#define MORUS1280_WORD_SIZE 8
#define MORUS1280_BLOCK_SIZE (MORUS_BLOCK_WORDS * MORUS1280_WORD_SIZE)
#define MORUS1280_BLOCK_ALIGN (__alignof__(__le64))
#define MORUS1280_ALIGNED(p) IS_ALIGNED((uintptr_t)p, MORUS1280_BLOCK_ALIGN)
struct morus1280_block {
u64 words[MORUS_BLOCK_WORDS];
};
union morus1280_block_in {
__le64 words[MORUS_BLOCK_WORDS];
u8 bytes[MORUS1280_BLOCK_SIZE];
};
struct morus1280_state {
struct morus1280_block s[MORUS_STATE_BLOCKS];
};
struct morus1280_ctx {
struct morus1280_block key;
};
struct morus1280_ops {
int (*skcipher_walk_init)(struct skcipher_walk *walk,
struct aead_request *req, bool atomic);
void (*crypt_chunk)(struct morus1280_state *state,
u8 *dst, const u8 *src, unsigned int size);
};
static const struct morus1280_block crypto_morus1280_const[1] = {
{ .words = {
U64_C(0x0d08050302010100),
U64_C(0x6279e99059372215),
U64_C(0xf12fc26d55183ddb),
U64_C(0xdd28b57342311120),
} },
};
static void crypto_morus1280_round(struct morus1280_block *b0,
struct morus1280_block *b1,
struct morus1280_block *b2,
struct morus1280_block *b3,
struct morus1280_block *b4,
const struct morus1280_block *m,
unsigned int b, unsigned int w)
{
unsigned int i;
struct morus1280_block tmp;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
b0->words[i] ^= b1->words[i] & b2->words[i];
b0->words[i] ^= b3->words[i];
b0->words[i] ^= m->words[i];
b0->words[i] = rol64(b0->words[i], b);
}
tmp = *b3;
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
b3->words[(i + w) % MORUS_BLOCK_WORDS] = tmp.words[i];
}
static void crypto_morus1280_update(struct morus1280_state *state,
const struct morus1280_block *m)
{
static const struct morus1280_block z = {};
struct morus1280_block *s = state->s;
crypto_morus1280_round(&s[0], &s[1], &s[2], &s[3], &s[4], &z, 13, 1);
crypto_morus1280_round(&s[1], &s[2], &s[3], &s[4], &s[0], m, 46, 2);
crypto_morus1280_round(&s[2], &s[3], &s[4], &s[0], &s[1], m, 38, 3);
crypto_morus1280_round(&s[3], &s[4], &s[0], &s[1], &s[2], m, 7, 2);
crypto_morus1280_round(&s[4], &s[0], &s[1], &s[2], &s[3], m, 4, 1);
}
static void crypto_morus1280_load_a(struct morus1280_block *dst, const u8 *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
dst->words[i] = le64_to_cpu(*(const __le64 *)src);
src += MORUS1280_WORD_SIZE;
}
}
static void crypto_morus1280_load_u(struct morus1280_block *dst, const u8 *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
dst->words[i] = get_unaligned_le64(src);
src += MORUS1280_WORD_SIZE;
}
}
static void crypto_morus1280_load(struct morus1280_block *dst, const u8 *src)
{
if (MORUS1280_ALIGNED(src))
crypto_morus1280_load_a(dst, src);
else
crypto_morus1280_load_u(dst, src);
}
static void crypto_morus1280_store_a(u8 *dst, const struct morus1280_block *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
*(__le64 *)dst = cpu_to_le64(src->words[i]);
dst += MORUS1280_WORD_SIZE;
}
}
static void crypto_morus1280_store_u(u8 *dst, const struct morus1280_block *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
put_unaligned_le64(src->words[i], dst);
dst += MORUS1280_WORD_SIZE;
}
}
static void crypto_morus1280_store(u8 *dst, const struct morus1280_block *src)
{
if (MORUS1280_ALIGNED(dst))
crypto_morus1280_store_a(dst, src);
else
crypto_morus1280_store_u(dst, src);
}
static void crypto_morus1280_ad(struct morus1280_state *state, const u8 *src,
unsigned int size)
{
struct morus1280_block m;
if (MORUS1280_ALIGNED(src)) {
while (size >= MORUS1280_BLOCK_SIZE) {
crypto_morus1280_load_a(&m, src);
crypto_morus1280_update(state, &m);
size -= MORUS1280_BLOCK_SIZE;
src += MORUS1280_BLOCK_SIZE;
}
} else {
while (size >= MORUS1280_BLOCK_SIZE) {
crypto_morus1280_load_u(&m, src);
crypto_morus1280_update(state, &m);
size -= MORUS1280_BLOCK_SIZE;
src += MORUS1280_BLOCK_SIZE;
}
}
}
static void crypto_morus1280_core(const struct morus1280_state *state,
struct morus1280_block *blk)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
blk->words[(i + 3) % MORUS_BLOCK_WORDS] ^= state->s[1].words[i];
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
blk->words[i] ^= state->s[0].words[i];
blk->words[i] ^= state->s[2].words[i] & state->s[3].words[i];
}
}
static void crypto_morus1280_encrypt_chunk(struct morus1280_state *state,
u8 *dst, const u8 *src,
unsigned int size)
{
struct morus1280_block c, m;
if (MORUS1280_ALIGNED(src) && MORUS1280_ALIGNED(dst)) {
while (size >= MORUS1280_BLOCK_SIZE) {
crypto_morus1280_load_a(&m, src);
c = m;
crypto_morus1280_core(state, &c);
crypto_morus1280_store_a(dst, &c);
crypto_morus1280_update(state, &m);
src += MORUS1280_BLOCK_SIZE;
dst += MORUS1280_BLOCK_SIZE;
size -= MORUS1280_BLOCK_SIZE;
}
} else {
while (size >= MORUS1280_BLOCK_SIZE) {
crypto_morus1280_load_u(&m, src);
c = m;
crypto_morus1280_core(state, &c);
crypto_morus1280_store_u(dst, &c);
crypto_morus1280_update(state, &m);
src += MORUS1280_BLOCK_SIZE;
dst += MORUS1280_BLOCK_SIZE;
size -= MORUS1280_BLOCK_SIZE;
}
}
if (size > 0) {
union morus1280_block_in tail;
memcpy(tail.bytes, src, size);
memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
crypto_morus1280_load_a(&m, tail.bytes);
c = m;
crypto_morus1280_core(state, &c);
crypto_morus1280_store_a(tail.bytes, &c);
crypto_morus1280_update(state, &m);
memcpy(dst, tail.bytes, size);
}
}
static void crypto_morus1280_decrypt_chunk(struct morus1280_state *state,
u8 *dst, const u8 *src,
unsigned int size)
{
struct morus1280_block m;
if (MORUS1280_ALIGNED(src) && MORUS1280_ALIGNED(dst)) {
while (size >= MORUS1280_BLOCK_SIZE) {
crypto_morus1280_load_a(&m, src);
crypto_morus1280_core(state, &m);
crypto_morus1280_store_a(dst, &m);
crypto_morus1280_update(state, &m);
src += MORUS1280_BLOCK_SIZE;
dst += MORUS1280_BLOCK_SIZE;
size -= MORUS1280_BLOCK_SIZE;
}
} else {
while (size >= MORUS1280_BLOCK_SIZE) {
crypto_morus1280_load_u(&m, src);
crypto_morus1280_core(state, &m);
crypto_morus1280_store_u(dst, &m);
crypto_morus1280_update(state, &m);
src += MORUS1280_BLOCK_SIZE;
dst += MORUS1280_BLOCK_SIZE;
size -= MORUS1280_BLOCK_SIZE;
}
}
if (size > 0) {
union morus1280_block_in tail;
memcpy(tail.bytes, src, size);
memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
crypto_morus1280_load_a(&m, tail.bytes);
crypto_morus1280_core(state, &m);
crypto_morus1280_store_a(tail.bytes, &m);
memset(tail.bytes + size, 0, MORUS1280_BLOCK_SIZE - size);
crypto_morus1280_load_a(&m, tail.bytes);
crypto_morus1280_update(state, &m);
memcpy(dst, tail.bytes, size);
}
}
static void crypto_morus1280_init(struct morus1280_state *state,
const struct morus1280_block *key,
const u8 *iv)
{
static const struct morus1280_block z = {};
union morus1280_block_in tmp;
unsigned int i;
memcpy(tmp.bytes, iv, MORUS_NONCE_SIZE);
memset(tmp.bytes + MORUS_NONCE_SIZE, 0,
MORUS1280_BLOCK_SIZE - MORUS_NONCE_SIZE);
crypto_morus1280_load(&state->s[0], tmp.bytes);
state->s[1] = *key;
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
state->s[2].words[i] = U64_C(0xFFFFFFFFFFFFFFFF);
state->s[3] = z;
state->s[4] = crypto_morus1280_const[0];
for (i = 0; i < 16; i++)
crypto_morus1280_update(state, &z);
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
state->s[1].words[i] ^= key->words[i];
}
static void crypto_morus1280_process_ad(struct morus1280_state *state,
struct scatterlist *sg_src,
unsigned int assoclen)
{
struct scatter_walk walk;
struct morus1280_block m;
union morus1280_block_in buf;
unsigned int pos = 0;
scatterwalk_start(&walk, sg_src);
while (assoclen != 0) {
unsigned int size = scatterwalk_clamp(&walk, assoclen);
unsigned int left = size;
void *mapped = scatterwalk_map(&walk);
const u8 *src = (const u8 *)mapped;
if (pos + size >= MORUS1280_BLOCK_SIZE) {
if (pos > 0) {
unsigned int fill = MORUS1280_BLOCK_SIZE - pos;
memcpy(buf.bytes + pos, src, fill);
crypto_morus1280_load_a(&m, buf.bytes);
crypto_morus1280_update(state, &m);
pos = 0;
left -= fill;
src += fill;
}
crypto_morus1280_ad(state, src, left);
src += left & ~(MORUS1280_BLOCK_SIZE - 1);
left &= MORUS1280_BLOCK_SIZE - 1;
}
memcpy(buf.bytes + pos, src, left);
pos += left;
assoclen -= size;
scatterwalk_unmap(mapped);
scatterwalk_advance(&walk, size);
scatterwalk_done(&walk, 0, assoclen);
}
if (pos > 0) {
memset(buf.bytes + pos, 0, MORUS1280_BLOCK_SIZE - pos);
crypto_morus1280_load_a(&m, buf.bytes);
crypto_morus1280_update(state, &m);
}
}
static void crypto_morus1280_process_crypt(struct morus1280_state *state,
struct aead_request *req,
const struct morus1280_ops *ops)
{
struct skcipher_walk walk;
u8 *dst;
const u8 *src;
ops->skcipher_walk_init(&walk, req, false);
while (walk.nbytes) {
src = walk.src.virt.addr;
dst = walk.dst.virt.addr;
ops->crypt_chunk(state, dst, src, walk.nbytes);
skcipher_walk_done(&walk, 0);
}
}
static void crypto_morus1280_final(struct morus1280_state *state,
struct morus1280_block *tag_xor,
u64 assoclen, u64 cryptlen)
{
u64 assocbits = assoclen * 8;
u64 cryptbits = cryptlen * 8;
struct morus1280_block tmp;
unsigned int i;
tmp.words[0] = cpu_to_le64(assocbits);
tmp.words[1] = cpu_to_le64(cryptbits);
tmp.words[2] = 0;
tmp.words[3] = 0;
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
state->s[4].words[i] ^= state->s[0].words[i];
for (i = 0; i < 10; i++)
crypto_morus1280_update(state, &tmp);
crypto_morus1280_core(state, tag_xor);
}
static int crypto_morus1280_setkey(struct crypto_aead *aead, const u8 *key,
unsigned int keylen)
{
struct morus1280_ctx *ctx = crypto_aead_ctx(aead);
union morus1280_block_in tmp;
if (keylen == MORUS1280_BLOCK_SIZE)
crypto_morus1280_load(&ctx->key, key);
else if (keylen == MORUS1280_BLOCK_SIZE / 2) {
memcpy(tmp.bytes, key, keylen);
memcpy(tmp.bytes + keylen, key, keylen);
crypto_morus1280_load(&ctx->key, tmp.bytes);
} else {
crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
return 0;
}
static int crypto_morus1280_setauthsize(struct crypto_aead *tfm,
unsigned int authsize)
{
return (authsize <= MORUS_MAX_AUTH_SIZE) ? 0 : -EINVAL;
}
static void crypto_morus1280_crypt(struct aead_request *req,
struct morus1280_block *tag_xor,
unsigned int cryptlen,
const struct morus1280_ops *ops)
{
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct morus1280_ctx *ctx = crypto_aead_ctx(tfm);
struct morus1280_state state;
crypto_morus1280_init(&state, &ctx->key, req->iv);
crypto_morus1280_process_ad(&state, req->src, req->assoclen);
crypto_morus1280_process_crypt(&state, req, ops);
crypto_morus1280_final(&state, tag_xor, req->assoclen, cryptlen);
}
static int crypto_morus1280_encrypt(struct aead_request *req)
{
static const struct morus1280_ops ops = {
.skcipher_walk_init = skcipher_walk_aead_encrypt,
.crypt_chunk = crypto_morus1280_encrypt_chunk,
};
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct morus1280_block tag = {};
union morus1280_block_in tag_out;
unsigned int authsize = crypto_aead_authsize(tfm);
unsigned int cryptlen = req->cryptlen;
crypto_morus1280_crypt(req, &tag, cryptlen, &ops);
crypto_morus1280_store(tag_out.bytes, &tag);
scatterwalk_map_and_copy(tag_out.bytes, req->dst,
req->assoclen + cryptlen, authsize, 1);
return 0;
}
static int crypto_morus1280_decrypt(struct aead_request *req)
{
static const struct morus1280_ops ops = {
.skcipher_walk_init = skcipher_walk_aead_decrypt,
.crypt_chunk = crypto_morus1280_decrypt_chunk,
};
static const u8 zeros[MORUS1280_BLOCK_SIZE] = {};
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
union morus1280_block_in tag_in;
struct morus1280_block tag;
unsigned int authsize = crypto_aead_authsize(tfm);
unsigned int cryptlen = req->cryptlen - authsize;
scatterwalk_map_and_copy(tag_in.bytes, req->src,
req->assoclen + cryptlen, authsize, 0);
crypto_morus1280_load(&tag, tag_in.bytes);
crypto_morus1280_crypt(req, &tag, cryptlen, &ops);
crypto_morus1280_store(tag_in.bytes, &tag);
return crypto_memneq(tag_in.bytes, zeros, authsize) ? -EBADMSG : 0;
}
static int crypto_morus1280_init_tfm(struct crypto_aead *tfm)
{
return 0;
}
static void crypto_morus1280_exit_tfm(struct crypto_aead *tfm)
{
}
static struct aead_alg crypto_morus1280_alg = {
.setkey = crypto_morus1280_setkey,
.setauthsize = crypto_morus1280_setauthsize,
.encrypt = crypto_morus1280_encrypt,
.decrypt = crypto_morus1280_decrypt,
.init = crypto_morus1280_init_tfm,
.exit = crypto_morus1280_exit_tfm,
.ivsize = MORUS_NONCE_SIZE,
.maxauthsize = MORUS_MAX_AUTH_SIZE,
.chunksize = MORUS1280_BLOCK_SIZE,
.base = {
.cra_flags = CRYPTO_ALG_TYPE_AEAD,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct morus1280_ctx),
.cra_alignmask = 0,
.cra_priority = 100,
.cra_name = "morus1280",
.cra_driver_name = "morus1280-generic",
.cra_module = THIS_MODULE,
}
};
static int __init crypto_morus1280_module_init(void)
{
return crypto_register_aead(&crypto_morus1280_alg);
}
static void __exit crypto_morus1280_module_exit(void)
{
crypto_unregister_aead(&crypto_morus1280_alg);
}
module_init(crypto_morus1280_module_init);
module_exit(crypto_morus1280_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
MODULE_DESCRIPTION("MORUS-1280 AEAD algorithm");
MODULE_ALIAS_CRYPTO("morus1280");
MODULE_ALIAS_CRYPTO("morus1280-generic");

544
crypto/morus640.c Normal file
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@ -0,0 +1,544 @@
/*
* The MORUS-640 Authenticated-Encryption Algorithm
*
* Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
* Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#include <asm/unaligned.h>
#include <crypto/algapi.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/skcipher.h>
#include <crypto/morus_common.h>
#include <crypto/scatterwalk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/scatterlist.h>
#define MORUS640_WORD_SIZE 4
#define MORUS640_BLOCK_SIZE (MORUS_BLOCK_WORDS * MORUS640_WORD_SIZE)
#define MORUS640_BLOCK_ALIGN (__alignof__(__le32))
#define MORUS640_ALIGNED(p) IS_ALIGNED((uintptr_t)p, MORUS640_BLOCK_ALIGN)
struct morus640_block {
u32 words[MORUS_BLOCK_WORDS];
};
union morus640_block_in {
__le32 words[MORUS_BLOCK_WORDS];
u8 bytes[MORUS640_BLOCK_SIZE];
};
struct morus640_state {
struct morus640_block s[MORUS_STATE_BLOCKS];
};
struct morus640_ctx {
struct morus640_block key;
};
struct morus640_ops {
int (*skcipher_walk_init)(struct skcipher_walk *walk,
struct aead_request *req, bool atomic);
void (*crypt_chunk)(struct morus640_state *state,
u8 *dst, const u8 *src, unsigned int size);
};
static const struct morus640_block crypto_morus640_const[2] = {
{ .words = {
U32_C(0x02010100),
U32_C(0x0d080503),
U32_C(0x59372215),
U32_C(0x6279e990),
} },
{ .words = {
U32_C(0x55183ddb),
U32_C(0xf12fc26d),
U32_C(0x42311120),
U32_C(0xdd28b573),
} },
};
static void crypto_morus640_round(struct morus640_block *b0,
struct morus640_block *b1,
struct morus640_block *b2,
struct morus640_block *b3,
struct morus640_block *b4,
const struct morus640_block *m,
unsigned int b, unsigned int w)
{
unsigned int i;
struct morus640_block tmp;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
b0->words[i] ^= b1->words[i] & b2->words[i];
b0->words[i] ^= b3->words[i];
b0->words[i] ^= m->words[i];
b0->words[i] = rol32(b0->words[i], b);
}
tmp = *b3;
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
b3->words[(i + w) % MORUS_BLOCK_WORDS] = tmp.words[i];
}
static void crypto_morus640_update(struct morus640_state *state,
const struct morus640_block *m)
{
static const struct morus640_block z = {};
struct morus640_block *s = state->s;
crypto_morus640_round(&s[0], &s[1], &s[2], &s[3], &s[4], &z, 5, 1);
crypto_morus640_round(&s[1], &s[2], &s[3], &s[4], &s[0], m, 31, 2);
crypto_morus640_round(&s[2], &s[3], &s[4], &s[0], &s[1], m, 7, 3);
crypto_morus640_round(&s[3], &s[4], &s[0], &s[1], &s[2], m, 22, 2);
crypto_morus640_round(&s[4], &s[0], &s[1], &s[2], &s[3], m, 13, 1);
}
static void crypto_morus640_load_a(struct morus640_block *dst, const u8 *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
dst->words[i] = le32_to_cpu(*(const __le32 *)src);
src += MORUS640_WORD_SIZE;
}
}
static void crypto_morus640_load_u(struct morus640_block *dst, const u8 *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
dst->words[i] = get_unaligned_le32(src);
src += MORUS640_WORD_SIZE;
}
}
static void crypto_morus640_load(struct morus640_block *dst, const u8 *src)
{
if (MORUS640_ALIGNED(src))
crypto_morus640_load_a(dst, src);
else
crypto_morus640_load_u(dst, src);
}
static void crypto_morus640_store_a(u8 *dst, const struct morus640_block *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
*(__le32 *)dst = cpu_to_le32(src->words[i]);
dst += MORUS640_WORD_SIZE;
}
}
static void crypto_morus640_store_u(u8 *dst, const struct morus640_block *src)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
put_unaligned_le32(src->words[i], dst);
dst += MORUS640_WORD_SIZE;
}
}
static void crypto_morus640_store(u8 *dst, const struct morus640_block *src)
{
if (MORUS640_ALIGNED(dst))
crypto_morus640_store_a(dst, src);
else
crypto_morus640_store_u(dst, src);
}
static void crypto_morus640_ad(struct morus640_state *state, const u8 *src,
unsigned int size)
{
struct morus640_block m;
if (MORUS640_ALIGNED(src)) {
while (size >= MORUS640_BLOCK_SIZE) {
crypto_morus640_load_a(&m, src);
crypto_morus640_update(state, &m);
size -= MORUS640_BLOCK_SIZE;
src += MORUS640_BLOCK_SIZE;
}
} else {
while (size >= MORUS640_BLOCK_SIZE) {
crypto_morus640_load_u(&m, src);
crypto_morus640_update(state, &m);
size -= MORUS640_BLOCK_SIZE;
src += MORUS640_BLOCK_SIZE;
}
}
}
static void crypto_morus640_core(const struct morus640_state *state,
struct morus640_block *blk)
{
unsigned int i;
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
blk->words[(i + 3) % MORUS_BLOCK_WORDS] ^= state->s[1].words[i];
for (i = 0; i < MORUS_BLOCK_WORDS; i++) {
blk->words[i] ^= state->s[0].words[i];
blk->words[i] ^= state->s[2].words[i] & state->s[3].words[i];
}
}
static void crypto_morus640_encrypt_chunk(struct morus640_state *state, u8 *dst,
const u8 *src, unsigned int size)
{
struct morus640_block c, m;
if (MORUS640_ALIGNED(src) && MORUS640_ALIGNED(dst)) {
while (size >= MORUS640_BLOCK_SIZE) {
crypto_morus640_load_a(&m, src);
c = m;
crypto_morus640_core(state, &c);
crypto_morus640_store_a(dst, &c);
crypto_morus640_update(state, &m);
src += MORUS640_BLOCK_SIZE;
dst += MORUS640_BLOCK_SIZE;
size -= MORUS640_BLOCK_SIZE;
}
} else {
while (size >= MORUS640_BLOCK_SIZE) {
crypto_morus640_load_u(&m, src);
c = m;
crypto_morus640_core(state, &c);
crypto_morus640_store_u(dst, &c);
crypto_morus640_update(state, &m);
src += MORUS640_BLOCK_SIZE;
dst += MORUS640_BLOCK_SIZE;
size -= MORUS640_BLOCK_SIZE;
}
}
if (size > 0) {
union morus640_block_in tail;
memcpy(tail.bytes, src, size);
memset(tail.bytes + size, 0, MORUS640_BLOCK_SIZE - size);
crypto_morus640_load_a(&m, tail.bytes);
c = m;
crypto_morus640_core(state, &c);
crypto_morus640_store_a(tail.bytes, &c);
crypto_morus640_update(state, &m);
memcpy(dst, tail.bytes, size);
}
}
static void crypto_morus640_decrypt_chunk(struct morus640_state *state, u8 *dst,
const u8 *src, unsigned int size)
{
struct morus640_block m;
if (MORUS640_ALIGNED(src) && MORUS640_ALIGNED(dst)) {
while (size >= MORUS640_BLOCK_SIZE) {
crypto_morus640_load_a(&m, src);
crypto_morus640_core(state, &m);
crypto_morus640_store_a(dst, &m);
crypto_morus640_update(state, &m);
src += MORUS640_BLOCK_SIZE;
dst += MORUS640_BLOCK_SIZE;
size -= MORUS640_BLOCK_SIZE;
}
} else {
while (size >= MORUS640_BLOCK_SIZE) {
crypto_morus640_load_u(&m, src);
crypto_morus640_core(state, &m);
crypto_morus640_store_u(dst, &m);
crypto_morus640_update(state, &m);
src += MORUS640_BLOCK_SIZE;
dst += MORUS640_BLOCK_SIZE;
size -= MORUS640_BLOCK_SIZE;
}
}
if (size > 0) {
union morus640_block_in tail;
memcpy(tail.bytes, src, size);
crypto_morus640_load_a(&m, src);
crypto_morus640_core(state, &m);
crypto_morus640_store_a(tail.bytes, &m);
memset(tail.bytes + size, 0, MORUS640_BLOCK_SIZE - size);
crypto_morus640_load_a(&m, tail.bytes);
crypto_morus640_update(state, &m);
memcpy(dst, tail.bytes, size);
}
}
static void crypto_morus640_init(struct morus640_state *state,
const struct morus640_block *key,
const u8 *iv)
{
static const struct morus640_block z = {};
unsigned int i;
crypto_morus640_load(&state->s[0], iv);
state->s[1] = *key;
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
state->s[2].words[i] = U32_C(0xFFFFFFFF);
state->s[3] = crypto_morus640_const[0];
state->s[4] = crypto_morus640_const[1];
for (i = 0; i < 16; i++)
crypto_morus640_update(state, &z);
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
state->s[1].words[i] ^= key->words[i];
}
static void crypto_morus640_process_ad(struct morus640_state *state,
struct scatterlist *sg_src,
unsigned int assoclen)
{
struct scatter_walk walk;
struct morus640_block m;
union morus640_block_in buf;
unsigned int pos = 0;
scatterwalk_start(&walk, sg_src);
while (assoclen != 0) {
unsigned int size = scatterwalk_clamp(&walk, assoclen);
unsigned int left = size;
void *mapped = scatterwalk_map(&walk);
const u8 *src = (const u8 *)mapped;
if (pos + size >= MORUS640_BLOCK_SIZE) {
if (pos > 0) {
unsigned int fill = MORUS640_BLOCK_SIZE - pos;
memcpy(buf.bytes + pos, src, fill);
crypto_morus640_load_a(&m, buf.bytes);
crypto_morus640_update(state, &m);
pos = 0;
left -= fill;
src += fill;
}
crypto_morus640_ad(state, src, left);
src += left & ~(MORUS640_BLOCK_SIZE - 1);
left &= MORUS640_BLOCK_SIZE - 1;
}
memcpy(buf.bytes + pos, src, left);
pos += left;
assoclen -= size;
scatterwalk_unmap(mapped);
scatterwalk_advance(&walk, size);
scatterwalk_done(&walk, 0, assoclen);
}
if (pos > 0) {
memset(buf.bytes + pos, 0, MORUS640_BLOCK_SIZE - pos);
crypto_morus640_load_a(&m, buf.bytes);
crypto_morus640_update(state, &m);
}
}
static void crypto_morus640_process_crypt(struct morus640_state *state,
struct aead_request *req,
const struct morus640_ops *ops)
{
struct skcipher_walk walk;
u8 *dst;
const u8 *src;
ops->skcipher_walk_init(&walk, req, false);
while (walk.nbytes) {
src = walk.src.virt.addr;
dst = walk.dst.virt.addr;
ops->crypt_chunk(state, dst, src, walk.nbytes);
skcipher_walk_done(&walk, 0);
}
}
static void crypto_morus640_final(struct morus640_state *state,
struct morus640_block *tag_xor,
u64 assoclen, u64 cryptlen)
{
u64 assocbits = assoclen * 8;
u64 cryptbits = cryptlen * 8;
u32 assocbits_lo = (u32)assocbits;
u32 assocbits_hi = (u32)(assocbits >> 32);
u32 cryptbits_lo = (u32)cryptbits;
u32 cryptbits_hi = (u32)(cryptbits >> 32);
struct morus640_block tmp;
unsigned int i;
tmp.words[0] = cpu_to_le32(assocbits_lo);
tmp.words[1] = cpu_to_le32(assocbits_hi);
tmp.words[2] = cpu_to_le32(cryptbits_lo);
tmp.words[3] = cpu_to_le32(cryptbits_hi);
for (i = 0; i < MORUS_BLOCK_WORDS; i++)
state->s[4].words[i] ^= state->s[0].words[i];
for (i = 0; i < 10; i++)
crypto_morus640_update(state, &tmp);
crypto_morus640_core(state, tag_xor);
}
static int crypto_morus640_setkey(struct crypto_aead *aead, const u8 *key,
unsigned int keylen)
{
struct morus640_ctx *ctx = crypto_aead_ctx(aead);
if (keylen != MORUS640_BLOCK_SIZE) {
crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
crypto_morus640_load(&ctx->key, key);
return 0;
}
static int crypto_morus640_setauthsize(struct crypto_aead *tfm,
unsigned int authsize)
{
return (authsize <= MORUS_MAX_AUTH_SIZE) ? 0 : -EINVAL;
}
static void crypto_morus640_crypt(struct aead_request *req,
struct morus640_block *tag_xor,
unsigned int cryptlen,
const struct morus640_ops *ops)
{
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct morus640_ctx *ctx = crypto_aead_ctx(tfm);
struct morus640_state state;
crypto_morus640_init(&state, &ctx->key, req->iv);
crypto_morus640_process_ad(&state, req->src, req->assoclen);
crypto_morus640_process_crypt(&state, req, ops);
crypto_morus640_final(&state, tag_xor, req->assoclen, cryptlen);
}
static int crypto_morus640_encrypt(struct aead_request *req)
{
static const struct morus640_ops ops = {
.skcipher_walk_init = skcipher_walk_aead_encrypt,
.crypt_chunk = crypto_morus640_encrypt_chunk,
};
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct morus640_block tag = {};
union morus640_block_in tag_out;
unsigned int authsize = crypto_aead_authsize(tfm);
unsigned int cryptlen = req->cryptlen;
crypto_morus640_crypt(req, &tag, cryptlen, &ops);
crypto_morus640_store(tag_out.bytes, &tag);
scatterwalk_map_and_copy(tag_out.bytes, req->dst,
req->assoclen + cryptlen, authsize, 1);
return 0;
}
static int crypto_morus640_decrypt(struct aead_request *req)
{
static const struct morus640_ops ops = {
.skcipher_walk_init = skcipher_walk_aead_decrypt,
.crypt_chunk = crypto_morus640_decrypt_chunk,
};
static const u8 zeros[MORUS640_BLOCK_SIZE] = {};
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
union morus640_block_in tag_in;
struct morus640_block tag;
unsigned int authsize = crypto_aead_authsize(tfm);
unsigned int cryptlen = req->cryptlen - authsize;
scatterwalk_map_and_copy(tag_in.bytes, req->src,
req->assoclen + cryptlen, authsize, 0);
crypto_morus640_load(&tag, tag_in.bytes);
crypto_morus640_crypt(req, &tag, cryptlen, &ops);
crypto_morus640_store(tag_in.bytes, &tag);
return crypto_memneq(tag_in.bytes, zeros, authsize) ? -EBADMSG : 0;
}
static int crypto_morus640_init_tfm(struct crypto_aead *tfm)
{
return 0;
}
static void crypto_morus640_exit_tfm(struct crypto_aead *tfm)
{
}
static struct aead_alg crypto_morus640_alg = {
.setkey = crypto_morus640_setkey,
.setauthsize = crypto_morus640_setauthsize,
.encrypt = crypto_morus640_encrypt,
.decrypt = crypto_morus640_decrypt,
.init = crypto_morus640_init_tfm,
.exit = crypto_morus640_exit_tfm,
.ivsize = MORUS_NONCE_SIZE,
.maxauthsize = MORUS_MAX_AUTH_SIZE,
.chunksize = MORUS640_BLOCK_SIZE,
.base = {
.cra_flags = CRYPTO_ALG_TYPE_AEAD,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct morus640_ctx),
.cra_alignmask = 0,
.cra_priority = 100,
.cra_name = "morus640",
.cra_driver_name = "morus640-generic",
.cra_module = THIS_MODULE,
}
};
static int __init crypto_morus640_module_init(void)
{
return crypto_register_aead(&crypto_morus640_alg);
}
static void __exit crypto_morus640_module_exit(void)
{
crypto_unregister_aead(&crypto_morus640_alg);
}
module_init(crypto_morus640_module_init);
module_exit(crypto_morus640_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
MODULE_DESCRIPTION("MORUS-640 AEAD algorithm");
MODULE_ALIAS_CRYPTO("morus640");
MODULE_ALIAS_CRYPTO("morus640-generic");

23
include/crypto/morus_common.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* The MORUS Authenticated-Encryption Algorithm
* Common definitions
*
* Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
* Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#ifndef _CRYPTO_MORUS_COMMON_H
#define _CRYPTO_MORUS_COMMON_H
#define MORUS_BLOCK_WORDS 4
#define MORUS_STATE_BLOCKS 5
#define MORUS_NONCE_SIZE 16
#define MORUS_MAX_AUTH_SIZE 16
#endif /* _CRYPTO_MORUS_COMMON_H */